This?Alcohol Sensor MQ3?is suitable for detecting alcoholconcentration on your breath, just like your common breathalyzer. It has a highsensitivity and fast response time. Sensor provides an analog resistive outputbased on alcohol concentration. The drive circuit is very simple, all it needsis one resistor. A simple interface could be a 0-3.3V ADC.
5V DC or AC circuit
Requires heater voltage
Operation Temperature: -10 to 70 degrees C
Heater consumption: less than 750mW